An apparatus comprising means for: obtaining an indication of a position of at least one user in real space; mapping the position of the user in real space to a position of the user in a sound space; and controlling an output audio signal, for rendering a sound scene via multiple audio channels, to provide rendering of a first sub-set of sound sources via at least a first sub-set of the multiple audio output channels and rendering a second sub-set of sound sources via at least a second sub-set of the multiple audio output channels, wherein an allocation of a plurality of sound sources to the first sub-set of sound sources or the second sub-set of sound sources is dependent upon at least a position of the user in the sound space; wherein an allocation of the multiple audio output channels to the first sub-set of the multiple audio output channels or the second sub-set of the multiple audio output channels is dependent upon available audio paths for the multiple audio output channels.